Mechanical refrigeration



Oct. 23, 1928. 1,688,893

C. C. SPREEN MECHANICAL REFRIGERATION Filed Jan. 29,, l927 oooooooooooooooo OO|OOOOOOOOOOOOOO Charles C. Spreen Inventor Attornegs Patented @ch 231, lQZd,

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MIEGHAN 1110M REFRIGERATIQN,

Application riled Eanuary 2t, 1955?. scrim No. 164,427.

My invention relates to mechanical refrigeration, and particularly to refrigerant expansion apparatus especially designed for domesticmechanical refrigerating units, and the principal object of my invention is to provide new and improved apparatus of this type. In the drawings accompanying this specification and forming a part of this application l have shown, for purposes of illustration, one form which my invention may assume, and in these drawings:

embodiment of my invention disclosed herein, while Figure 2 is a section on the line 22 of Figure l,

The embodiment of my invention shown herein comprises a refrigerator cabinet ll having a refrigerating compartment 12 housing a sectional refrigerant expansion apparatus 13 consisting of a plurality of units it, only two being shown, each unit consisting of a refrigerant expansion compartment 15 having the form of a spiral tube, Each 1 turn of the spiral 15 is engaged by a multiplicity of perforated plates 16 forming fins for increasing heat transfer; and the several spirals are connected together in spaced relation by supporting means in" the form of a plurality of brackets 17 depending from the top wall 18 of the compartment 12, and attached thereto by screws 19, and directly engaging the refrigerant expansion compartments 15. The edges of the fins 16 of adjacent units 14: engage and support sleeve-like receptacles 20 adapted for the reception of ice trays 21.

Cine end of the top unit i l is connected by an extension 22 of the spiral tube 15 to the refrigerant inlet valve 23 of the refrigerating system, the other end of the top unit 14- is connected by a connection 24 with one end of the, lower unit i l, and the other end of the lower unit it is connected by a similar extension 25 to the compressor unit, not shown, the several units are so connected that the assembled compartments 15 form a single refrigerant expansion chamber.

From the above description it will be obvious to those skilled in the art that I have provided a refrigerant expansion unit which may be used in varying numbers to form a refrigerant expansion apparatus of any desired size and capacity.

At the same time it will be obvious to those skilled in the art that the embodiment of the invention herein shown and described may be variously changed and modified without departing from the spirit of my invention or sacrificing the advantages thereof, and it 4 therefore will be understood that the dis- Figure l is a front elevation showing the closure herein is illustrative only, and that my invention is not limited thereto,

ll claim:

1, Refrigerant expansion apparatus comprising: a plurality of refrigerant expansion units formed substantially identical, and each. comprising a refrigerant expansion compartment, having the form of a spiral tube; fin means on said spiral tubes; ice tray recep' tacles supported by said fin means; a frame work connecting said spiral tubes into a sin gle refrigerant expansion unit; and means connecting said spiral tubes into a single refrigerant expansion chamber 2. Refrigerant expansion apparatus comprising: a plurality of refrigerant expansion units formed substantially identical, and each comprising a refrigerant expansion compartment, having the form of a spiral tube; fin means on said spiral tubes; ice tray receptacles supported by said fin means; a framework directly connecting and supporting said spiral tubes into a single refrigerant expansion unit; and means connecting said spiral tubes into a single refrigerant expansion chamber 3. Refrigerant expansion apparatus comprising: a plurality of refrigerant expansion units formed substantially identical, and each comprising a refrigerant expansion compartment having the form of a spiral tube; fin means connecting the turns of each of said spiral tubes; ice tray receptacles supported by said fin means; a. framework connecting said spiral tubes into a single refrigerant expansion unit; and means connecting said spiral tubes into a single refrigerant expansion chamber.

I d, efrigerant expansion apparatus comfill llll) prising: a plurality of refrigerant expansion necting and supporting said spiral tubes into units formed substantially i entical, and each a single refrigerant expansion unit; and comprising a refrigerant expansion compartmeans connecting said spiral tubes into a sin- 10 ment, having the form of a spiral tube; fin g frigerant expansion chamber.

- means connecting the turns of each of said In testimony whereof I hereunto affix my spiral tubes; ice tray receptacles suplported signature. by said fin means; a framework direct y con- CHARLES C. SPREEN. 

